/*
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package org.apache.flink.runtime.operators.coordination;

import org.apache.flink.annotation.Internal;

import javax.annotation.concurrent.ThreadSafe;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.BiFunction;
import java.util.function.Function;

/** Basic implementation of {@link CoordinatorStore}. */
@ThreadSafe
@Internal
public class CoordinatorStoreImpl implements CoordinatorStore {
    private final Map<Object, Object> store = new ConcurrentHashMap<>();

    @Override
    public boolean containsKey(Object key) {
        return store.containsKey(key);
    }

    @Override
    public Object get(Object key) {
        return store.get(key);
    }

    @Override
    public Object putIfAbsent(Object key, Object value) {
        return store.putIfAbsent(key, value);
    }

    @Override
    public Object computeIfPresent(
            Object key, BiFunction<Object, Object, Object> remappingFunction) {
        return store.computeIfPresent(key, remappingFunction);
    }

    @Override
    public <R> R apply(Object key, Function<Object, R> consumer) {
        return consumer.apply(store.get(key));
    }
}
